If coming from I-5, Google Maps has good directions and a map that will get you here easily.

Directions

From downtown:

Take 4th Ave East towards Lacey. As you leave downtown, cross Plum [stoplight], cross Eastside [stoplight]. One block past Eastside, turn LEFT on Puget, go 0.6 miles to 4-way stop. Take a RIGHT at 4-way stop onto San Francisco. Go two blocks to another 4-way stop. Turn LEFT onto Bethel and go about 1/3 mile. Turn RIGHT on Miller, OLT is 1/3 of a mile on right. Note: there is a sign posted on Miller for OLT, so you can't miss it!

From Lacey:

Take Martin or Pacific West (these streets turn into State). From State, going downhill into Olympia's downtown, at 3rd stoplight turn RIGHT onto Puget. Go 0.6 miles to 4-way stop. Take a RIGHT at 4-way stop onto San Francisco. Go two blocks to another 4-way stop. Turn LEFT onto Bethel and go about 1/3 mile. Turn RIGHT on Miller, OLT is 1/3 of a mile on right. Note: there is a sign posted on Miller for OLT, so you can't miss it!